Serious computer crash

[Asyn]

1. I've reinstalled, but the problem is the same.

2. When i run a full system scan, some files can't be scanned (Compression bomb). What is the compression bomb?

1. What crashes and when and how..??
2. You can ignore this.

[Ghost2]

When i'm trying to read from the 300 GB hard drive, the computer immediately crashes.

[Asyn]

When i'm trying to read from the 300 GB hard drive, the computer immediately crashes.

As you don't get a BSOD.
How does it crash..? What happens..?
You can run free Mbam, to check if the system is clean. (Update it after install..!!!)
http://www.malwarebytes.org/mbam.php

[Coolmario88]

Crashes like what the OP is saying happened on my windows xp computer when i had google chrome installed. but it stopped after google chrome got removed.  So basically the Crashes on your computer Could be happening from a program that you have installed.

[Tarq57]

CoolMario, it is possible there is a program confliction, however that doesn't address the cause of it. The majority of users can run Avast and Chrome, or any other legitimate program.

I'm suspecting malware at this point.
I think an OTL log might be called for. But first, details about the system crash would be useful. As Asyn has asked. Please state "how" it crashes.

[Ghost2]

When i'm trying to read from the 300 GB hard drive, the computer immediately crashes.

As you don't get a BSOD.
How does it crash..? What happens..?
You can run free Mbam, to check if the system is clean. (Update it after install..!!!)
http://www.malwarebytes.org/mbam.php

Just stops, doesn't do anything, just the mouse arrow moves.

[Ghost2]

An important thing:
The crashes start only after an update.

[Tarq57]

Do you mean it becomes unresponsive, or programs close by themselves? Does it freeze on whatever screen is up at the time? You say you still have the mouse. Can you right-click the bottom task bar when this happens and open task manager: find out what process is using most of the CPU?

If the above isn't accurate, describe more accurately what it's doing.

[Ghost2]

Do you mean it becomes unresponsive, or programs close by themselves? Does it freeze on whatever screen is up at the time? You say you still have the mouse. Can you right-click the bottom task bar when this happens and open task manager: find out what process is using most of the CPU?

If the above isn't accurate, describe more accurately what it's doing.

It becomes unresponsive! The programs don't close, totally freeze, mouse moves, but can't click.

[Ghost2]

The exact problems are:

When i start the computer it starts normally, but after I trying to open something from or copy to the 300 GB hard drive (simply click on its icon from the "My computer", the computer immediately crashes (unresponding). Also when i want to open the Recycle bin, this happens (maybe the recycle bin opens the 300 GB hard drive too). And sometimes crashes suddenly.
BUT when I turn off one of the parmanent protections, and try to use the 300 GB hard drive, and re-enable protection, it works correctly until the next computer restart.



The another problem is that when avast found a threat on the flash drive, the browsers (IE and Firefox) become very slow until the next computer restart, even the flash drive was removed.

[Shiw Liang]

It is an external hard disk

[Ghost2]

It is an external hard disk

Can't handle external hard drives?

[Shiw Liang]

At school when I put my pen drive to the pc (ram half 512mb and OS windows Xp SP2)
Well sometimes it can open properly and sometimes it freezes when "my computer" is opened
When I close "my computer", crash...everything is gone on the screen except wallpaper and cursor.
What I do is that I remove the pen drive (Without doing safely remove might lose data) and the screen returns to normal again...

[Ghost2]

At school when I put my pen drive to the pc (ram half 512mb and OS windows Xp SP2)
Well sometimes it can open properly and sometimes it freezes when "my computer" is opened
When I close "my computer", crash...everything is gone on the screen except wallpaper and cursor.
What I do is that I remove the pen drive (Without doing safely remove might lose data) and the screen returns to normal again...

The pendrive works fine until Avast doesn't find a threat. The computer doesn't crash because of the pendrive, just slows down the browsers.

[Shiw Liang]

Actually I am wondering if your external hard disk is not overloaded...or that your computer is not reading it too slowly